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bbe638af |
1 | package SQL::Abstract::Clauses; |
2 | |
3 | use strict; |
4 | use warnings; |
5 | use mro 'c3'; |
6 | use base 'SQL::Abstract'; |
7 | |
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8 | BEGIN { *puke = \&SQL::Abstract::puke } |
9 | |
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10 | sub new { |
11 | shift->next::method(@_)->register_defaults |
12 | } |
13 | |
14 | sub register_defaults { |
15 | my ($self) = @_; |
16 | $self->{clauses_of}{select} = [ qw(select from where order_by) ]; |
17 | $self->{expand}{select} = sub { shift->_expand_statement(@_) }; |
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18 | $self->{render}{select} = sub { shift->_render_statement(select => @_) }; |
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19 | $self->{expand_clause}{"select.$_"} = "_expand_select_clause_$_" |
20 | for @{$self->{clauses_of}{select}}; |
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21 | $self->{clauses_of}{update} = [ qw(update set where returning) ]; |
22 | $self->{expand}{update} = sub { shift->_expand_statement(@_) }; |
23 | $self->{render}{update} = sub { shift->_render_statement(update => @_) }; |
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24 | $self->{expand_clause}{"update.$_"} = "_expand_update_clause_$_" |
25 | for @{$self->{clauses_of}{update}}; |
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26 | $self->{clauses_of}{delete} = [ qw(delete_from where returning) ]; |
27 | $self->{expand}{delete} = sub { shift->_expand_statement(@_) }; |
28 | $self->{render}{delete} = sub { shift->_render_statement(delete => @_) }; |
29 | $self->{expand_clause}{'delete.delete_from'} = sub { |
30 | $_[0]->_expand_maybe_list_expr($_[1], -ident) |
31 | }; |
32 | $self->{expand_clause}{'delete.where'} = 'expand_expr'; |
33 | $self->{expand_clause}{'delete.returning'} = sub { |
34 | shift->_expand_maybe_list_expr(@_, -ident); |
35 | }; |
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36 | $self->{clauses_of}{insert} = [ |
37 | 'insert_into', 'fields', 'values', 'returning' |
38 | ]; |
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39 | $self->{expand}{insert} = sub { shift->_expand_statement(@_) }; |
40 | $self->{render}{insert} = sub { shift->_render_statement(insert => @_) }; |
41 | $self->{expand_clause}{'insert.insert_into'} = sub { |
42 | shift->expand_expr(@_, -ident); |
43 | }; |
44 | $self->{expand_clause}{'insert.returning'} = sub { |
45 | shift->_expand_maybe_list_expr(@_, -ident); |
46 | }; |
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47 | $self->{render_clause}{'insert.fields'} = sub { |
48 | return $_[0]->render_aqt({ -row => [ $_[1] ] }); |
49 | }; |
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50 | return $self; |
51 | } |
52 | |
df0f5af9 |
53 | sub _expand_select_clause_select { |
54 | my ($self, $select) = @_; |
55 | +(select => $self->_expand_maybe_list_expr($select, -ident)); |
56 | } |
57 | |
58 | sub _expand_select_clause_from { |
59 | my ($self, $from) = @_; |
60 | +(from => $self->_expand_maybe_list_expr($from, -ident)); |
61 | } |
62 | |
63 | sub _expand_select_clause_where { |
64 | my ($self, $where) = @_; |
65 | +(where => $self->expand_expr($where)); |
66 | } |
67 | |
68 | sub _expand_select_clause_order_by { |
69 | my ($self, $order_by) = @_; |
70 | +(order_by => $self->_expand_order_by($order_by)); |
71 | } |
72 | |
889fdd38 |
73 | sub _expand_update_clause_update { |
74 | my ($self, $target) = @_; |
75 | +(update => $self->expand_expr($target, -ident)); |
76 | } |
77 | |
78 | sub _expand_update_clause_set { |
79 | +(set => shift->_expand_update_set_values(@_)); |
80 | } |
81 | |
82 | sub _expand_update_clause_where { |
83 | +(where => shift->expand_expr(@_)); |
84 | } |
85 | |
86 | sub _expand_update_clause_returning { |
87 | +(returning => shift->_expand_maybe_list_expr(@_, -ident)); |
88 | } |
89 | |
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90 | sub _expand_statement { |
91 | my ($self, $type, $args) = @_; |
92 | my $ec = $self->{expand_clause}; |
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93 | return +{ "-${type}" => +{ |
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94 | map { |
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95 | my $val = $args->{$_}; |
96 | if (defined($val) and my $exp = $ec->{"${type}.$_"}) { |
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97 | if ((my (@exp) = $self->$exp($val)) == 1) { |
98 | ($_ => $exp[0]) |
99 | } else { |
100 | @exp |
101 | } |
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102 | } else { |
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103 | ($_ => $val) |
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104 | } |
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105 | } sort keys %$args |
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106 | } }; |
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107 | } |
108 | |
109 | sub _render_statement { |
110 | my ($self, $type, $args) = @_; |
111 | my @parts; |
112 | foreach my $clause (@{$self->{clauses_of}{$type}}) { |
113 | next unless my $clause_expr = $args->{$clause}; |
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114 | local $self->{convert_where} = $self->{convert} if $clause eq 'where'; |
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115 | my ($sql) = my @part = do { |
116 | if (my $rdr = $self->{render_clause}{"${type}.${clause}"}) { |
117 | $self->$rdr($clause_expr); |
118 | } else { |
119 | my ($clause_sql, @bind) = $self->render_aqt($clause_expr); |
120 | my $sql = join ' ', |
121 | $self->_sqlcase(join ' ', split '_', $clause), |
122 | $clause_sql; |
123 | ($sql, @bind); |
124 | } |
125 | }; |
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126 | next unless defined($sql) and length($sql); |
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127 | push @parts, \@part; |
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128 | } |
129 | return $self->_join_parts(' ', @parts); |
130 | } |
131 | |
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132 | sub select { |
133 | my ($self, @args) = @_; |
134 | my %clauses; |
135 | @clauses{qw(from select where order_by)} = @args; |
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136 | |
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137 | # This oddity is to literalify since historically SQLA doesn't quote |
8e6988ce |
138 | # a single identifier argument, so we convert it into a literal |
139 | |
4ee74413 |
140 | $clauses{select} = { -literal => [ $clauses{select}||'*' ] } |
141 | unless ref($clauses{select}); |
142 | |
81b270e7 |
143 | my ($sql, @bind) = $self->render_expr({ -select => \%clauses }); |
144 | return wantarray ? ($sql, @bind) : $sql; |
145 | } |
146 | |
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147 | sub update { |
148 | my ($self, $table, $set, $where, $options) = @_; |
149 | my %clauses; |
150 | @clauses{qw(update set where)} = ($table, $set, $where); |
151 | puke "Unsupported data type specified to \$sql->update" |
152 | unless ref($clauses{set}) eq 'HASH'; |
153 | @clauses{keys %$options} = values %$options; |
154 | my ($sql, @bind) = $self->render_expr({ -update => \%clauses }); |
155 | return wantarray ? ($sql, @bind) : $sql; |
156 | } |
157 | |
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158 | sub delete { |
159 | my ($self, $table, $where, $options) = @_; |
160 | my %clauses = (delete_from => $table, where => $where, %{$options||{}}); |
161 | my ($sql, @bind) = $self->render_expr({ -delete => \%clauses }); |
162 | return wantarray ? ($sql, @bind) : $sql; |
163 | } |
164 | |
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165 | sub insert { |
166 | my ($self, $table, $data, $options) = @_; |
167 | my %clauses = (insert_into => $table, %{$options||{}}); |
168 | my ($f_aqt, $v_aqt) = $self->_expand_insert_values($data); |
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169 | $clauses{fields} = $f_aqt if $f_aqt; |
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170 | $clauses{values} = $v_aqt; |
171 | my ($sql, @bind) = $self->render_expr({ -insert => \%clauses }); |
172 | return wantarray ? ($sql, @bind) : $sql; |
173 | } |
174 | |
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175 | 1; |